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Conference ssdevo::hsz40_product

Title:HSZ40 Product Conference
Moderator:SSDEVO::EDMONDS
Created:Mon Apr 11 1994
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:902
Total number of notes:3319

813.0. "Add disk to RAID set on the fly?" by BRLLNT::MONTAQUILA () Tue Mar 18 1997 17:42

    Does HSOF 2.7, 3.0 or 5.0 allow a disk to be added "on the fly" to
    a raid set or do I have to BACKUP the raid set and rebuild from
    scratch?
    
    If not, is this being considered?
    
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813.1OTOOA::LAVIGNETue Mar 18 1997 18:344
    No you can not add on the fly.  Yes it is being considered but you will
    have to check with product managment to det details.  I usually
    recommend that the customer starts a new Raid set when he runs out of
    room.  Otherwise you are constantly redoing your subsystem.
813.2LEXSS1::GINGERRon GingerThu Mar 20 1997 10:443
    A much more important question would be if the operating system can
    handle the growth of a disk under it. I think the usual answer is NO.
    
813.3Yup operating systems don't like changes like thatSSDEVO::RMCLEANThu Mar 20 1997 16:585
re .-1

That is a good point UNLESS you have a partitioned raidset.  Then it might
make some sense.  If you need more info talk to product management but
I don't see much being done for HSx40/50 controllers in this manner.
813.4SMURF::KNIGHTFred KnightThu Mar 20 1997 18:025
If you want to grow the size of an existing volume on
Digital UNIX, then just use ADVFS.  It has that capability.

Note that this is a S/W capability, you still can't change
the size of an underlying logical spindle.